After using screws and nails to stopper opened tubes of caulk, I figured there had to be a better way. Looking around the shop, I saw some clear 1/2-in.-dia. tubing. I cut a piece of the tubing about 2 in. long. Then I warmed the end with a heat gun and immediately squeezed it in my bench vise. Allowing it to cool while in the vise creates a sealed bond. I simply twist and push the tubing over the spout of a caulk tube for an airtight seal. The crimped end serves as a handle, since heating and compressing the tubing makes it rigid.
—R. Timothy Maddox, Lynchburg, Va.
Edited and Illustrated by Charles Miller
From Fine Homebuilding #285